it has been a morning and a mess here in daly city. there are front loaders and vacuum trucks everywhere trying to deal with this mudslide. it started with a water pipe that broke off. i wanted to show you what it has done to the hillside this morning as a section came down bringing trees and debris right into the neighborhood. neighbors say it sounded like a storm. water rushing down the hillside along lusanne avenue carrying debris and trees trapping parked cars. it was just to the left of romero's home. >> i was not aware there was a tank up there. >> reporter: what do you think now that you know what happened? >> i'm guessing, you know, infrastructure might be getting old. >> reporter: the gap in the hillside shows where it came from. there is a 978,000 gallon water tank that was 3/4 full. >> it is an eight-inch cast iron pipe and it sheared off on the hillside. we measured about 45,000 gallons of water. we took in the water level before it broke and we isolated it. >> reporter: he said they isolated the shutoff valve within ten mi